proof

/pruːf/
noun
  1. Evidence or facts that show something is true or exists.
    • The detective found proof that the suspect was at the scene.
    • Her success is proof that hard work pays off.
    • Do you have any proof that you paid the bill?
  2. A test or trial to show that something is correct or works properly.
    • The new software is still in the proof stage.
    • They put the safety equipment to the proof before using it.
    • The recipe was a proof of her cooking skills.
  3. A standard measure of the alcohol content in a drink, especially liquor.
    • The label on the bottle shows the proof number.
    • This whiskey is 80 proof, which means it is 40% alcohol.
    • He only drinks spirits that are at least 100 proof.
Antonyms
verb
  1. To make something resistant to a specified thing, such as water, fire, or damage.
    • The company proofs its fabrics to make them stain-resistant.
    • We need to proof the basement against flooding.
    • He proofed the wooden deck with a special sealant.
  2. To read and correct a text for errors before it is printed or published.
    • I need to proof my essay one more time.
    • The editor will proof the article before it goes to press.
    • She proofed the manuscript for spelling mistakes.
adjective
  1. Resistant to something; able to withstand or protect against a specified thing.
    • They installed a bulletproof window for security.
    • This jacket is waterproof, so it keeps you dry in the rain.
    • The safe is fireproof and can protect documents from heat.